Pumping machinery



Get. 5 1926.

FL A. BROWNE PUMPING MACHINERY Mmm .\|||||||| IIL iled August 14, 1922 INVENTOR.-

A T ORNE YS.

Patented FRANK A. BROWNE, F WAYNE, PENNSYLVANIA, ASSIGNOR TO THE BARBER ASPHALT COMPANY, GE FHILADELPHIA, PENNSYLVANIA, A CGRPDRTION 0F WEST VEB/- GIN'IA.

anni

naar ai..

PMPING MACHINERY.

Application lednugust 1t, 11922.y Serial Nc. 581.7%.

rlhis invention relates to. pumping machinery and more particularly to machinery for pumping materials which are extremely viscous or solid at ordinary temperatures and which require heating in order to promote a fluent condition, such for instance as Trinidad asphalt, refined asphalt, asphalt cements and the like. Such materials often contain mineral matter, the presence of which together with the normally solid or viscous condition of the material renders the act of transferal by pumping an extremely ditlicult one attended constantly by numerous hazards.

An object of the invention is to provide a new and improved .pump designed particularly to maintain a fluent condition in the material to be transferred, to provide automatic valves of an extremely simple nature which will operate with a minimum amount of wear on the parts, and to permit the facile dissembling of the parts for the purpose of cleaning or re air.

These and other objects are accomplished b what now regard as thepreerred form ely my invention from among numerous other possible forms and arrangements embraced within the spirit of the invention and the sccpe of the appended claims.

n the accompanying drawings, Fig. I is a view in top plan of a pump constructed in daccordance with the present invention; an

Fig. II is a view of the pump in side elevation, illustrating the pumplng cylinder and valve chest in longitudinal section.

i With reference to the drawings indicates a bed frame sup orting at oneend a cylinder 11 disposed 1n' a horizontal position having one end open and its interior bored adjacent its opposite end to provide a displacement chamber A12 aording a slight clearance around the plunger when the latter is at the end of its instroke. The inner end of the cylinder is reduced in diameter and provide with an integral intake and deliveryconnection in the nature of a vertically disposed cylinder 13 bored uniformly to provide a vertlcal chamber. The interior of the cylinder 13 is subdivided by an annular transverse internal ledge 14 into a of superposed valve chambers 15 and 16, the former constituting the outlet valve chamber and the latter the inlet valve chamber.

pair

valve cage 17 is arranged in each valve chamber, and comprises an annular base 17"' which rests upon an annular member 18 constituting a valve seat. The member 18 associated with the upper valve cage 'rests upon the ledge 14. and that ot the lower cage.

rests upon the flange 19 of a steam jackctcd elbow 20 which is applied to the lower open end of the cylinder 13. rlhe cages are inserted into the bore from opposite ends, their positions being limited primarily by the ledge 14. The valve cage in each instance includes intersecting arch members 21 which confine spherical or ball valves `22 and 23 for controlling respectively the outlet and inlet ports of the valve chambers 15 and 16. The spherical valves.22, 23 normally rest by gravity upon the annular seats 18. closing their openings but are displaced by the forcible introduction and discharge of material through said seats. The valve seats 18, 18 it will be seen, are located directly at either side of the opening through which the um chamber 12 communicates with the interior of the cylinder 13. The lower `valve cage is held in place as previously stated by the application of the elbow 20, while the upper valve cage is held in place 'by the application to the upper end ot the cylinder 13 of the flanged end 24 of a steam jacketed discharge pipe 25.

The open end ofthe cylinder 11 is rccessed internally to provide an annular packing cavity 26. Between the cavity 26 and the chamber 12 is an .annular internal ridge 27 constituting the only area of contact bctween a plunger 28 which operates in the displacement chamber 12 and the internal Surface of the cylinder 11. A compression ring 29 is seated within the outer end of the cavity 26 and is forced into the cavity to compress the packing around the plunger 28 by means of bolts 30 which penetrate an apertured flange 31 forming art of the compression ring 29 and whic enter appropriately threaded recesses formed in the end Wall of the cylinder 11. The plunger 28 is preferably of uniform diameter throughout to facilitate cleaning and is formed With a rounded inner end.

The walls of the displacement cylinder 11 are suliciently thick to permit the formation therein of annular intercommunicating spaces 32 which serve for the introduction pai-king at an elevated temperature. The. walls of the valve cylinder 13 are similarly supplied With linterspaces 34 assuring the maintenance of a high temperature therewithin. Thus, it will be seen, the plunger packing` the valve chamber, and the entire pump chamber including its reduced connection to the valve chamber are jacketed for heating. If desired the Wall of the' valve cylinder 13 may be perforated at points ad-- jacent the valve chambers as at 35 to permit access to the interior 4for the purpose of adjusting the valves, the apertures being normally closed by removable plugs.

'lhc plunger 28 may be reciprocated in any manner desired, one example being illustrated in the form of a steam cylinder 36 suitably mounted on the bed frame 10 and containing a piston Which is connected to said plunger thrpugh the medium of the pistou rod 37. The plunger 28 may however be motor driven or shifted in any other manner as the present invention is not concerned with the specific pump operating means but rather to the pump itself.

Through repeated oscillation of the plunger 28 the heated 'fluent material is dravvn through elbow 20 past the inlet valve 23 unseating the same at each' intake stroke, lilling the interior of the chamber 12. The material in the chamber 12 is subsequently displaced at each discharge stroke ofthe plunger 28 and forced through the valve chamber l5 unseating the valve22 and discharging through the pipe 25.

Owing to the extremely simple nature of the intake and outlet valves it will be seen that the possibility of damage to the parts or failure of operation is reduced to a minimum. In view of the fact that r`the Walls enclosing all of the working parts are maintained at a high teniperature by circulating steam the possibility of damage to the pump; ing mechanism as a Whole is` minimized, and the chilling of the material is avoided in the event. that operation ofthe pump should cease for any reason. The heating of the packing is ell'ective t0 preventv adhesion of the asphalt or other material to the packing which would occur if the material were chilled in lcontact with the packing. By

eliminating contact between theplunger and the cylinder Walls as much as possible and accomplishing the transferal of the material by mere displacement insteadof by complete reduction of cylinder space as with a tightly fitting piston, possibility of the plunger sticking is prevented and the *smooth Working of. the plunger is assured.

rl`hus, it will be seen that ll have devised a' novel form of pump in Which the essential elements have been reduced to a high degree of simplicity and are maintained at an elevated temperature, with a View to insuring constant opertion of the pump under varying conditions, to reducing vvear and to permitting easy dismantling, as Well as to securing other advantages which Will be apparent to those familiar with this art. While I have illustrated the principle of myy invention in connection with a pump of the single action plunger type it Will -be apparent that the same principles may be embodied in machines of 'other types such as double acting cylinder and piston pumps and the like, and hence I do not Wish to limit myself to the exact construction shown.

Having thus described my invention, I claim '1. A reciprocating pump for asphalt and the like embodying a pump chamber, intake and delivery valves, a heating jacket for said pump chamber and intake and delivery valves, and means for also heating the packing of the operating member.

2. A plunger pump for 'asphalt and the like embodying a plunger chamber, intake and delivery connections; and a heating Jacket surrounding said plunger chamber, the plunger packing, and the intake and delivery Valve connections.

3. A pump for asphalt and the like comprising a reciprocating plunger and a pump chamber surrounding said plunger with clearance, When the plunger is at the end of its instroke; an intake and delivery valve :hamber extending across the end of the pump chamber andfcommunicating therewith; intake and delivery valve seats in said valve chamber directly at either side of the opening into the pump chamber, with valves for said seats; and a heating jacket for said pump and valve chambers and their intercommunication, and also for the plunger` packing.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this 5th day of August, 1922.

FRANK A. BROWN E. 

